Locomotive boiler



Patented Dec. 31, 1929 ETED "STATES CLARENCE E. BODINE, SEDALIA, MISSOURI LOCOMOTIVE BOILER Application filed July 29,

This invention relates to improvements in locomotive boilers and it consists of the matters hereinafter described and more particularly pointed out in the appended claims.

' The primary object of the invention is to provide in the firebox of a locomotive boiler, a transversely curved, and downwardly and forwardly inclined, flat tubular water wall that communicates at its sides with the side water legs of the boiler and which is connected between its sides by one or more upright, flat tubular water walls that open through the crown sheet, to not only increase the water steaming and circulating etfioiency of the boiler but to also dispense with the usual arch brick and at the same time to provide a rigidly braced and supported crown sheet.

This object of the invention, as well as 29 others together with the many advantages thereof will more fully appear as I proceed with my specification.

In the drawings:

4 Fig. 1 is a vertical longitudinal sectional View through the firebox end of a locomotive boiler embodying my invention.

Fig. 2 is a vertical transverse sectional View as taken on the line 22 of Fig. 1.

Fig. 3 is a detail horizontal sectional view as taken on line 33 of 1 and illustrates a slightly modified form of my invention.

Referring now in detail to that embodiment of the invention illustrated in the ac- I companying drawing, 1 indicates the back or door sheet of the firebox and 2 indicates the flue sheet thereof and forming a continuation of the flue sheet is the inside throat sheet 3. The sides of the firebox are formed by the side sheets fir-4: and the top of the firebox is provided by the transversely arched or curved crown sheet 5 which merges into the firebox side sheets. Said side sheets and crown sheet extend between and are connected at their 1 ends to the back sheet 1 and flue and throat sheets 2 and 3 respectively, the crown sheet being inclined upwardly toward the flue sheet .end in the usual manner.

The wrapper of the boiler includes a roof sheet 6 and a back head 7, outer fire box sheets 88 and an outer throat sheet 9, together with 1927. Serial No. 209,285.

the boiler shell 10, all in the manner well known. The front and rear water legs 11 and 12 respectively and the side water legs 13-13 are all closed at the bottom by a mud ring 14, 1 while the bottom of the firebox is formed by the grate indicated by the dotted line 15 in Fig. 1. In the back head and back sheet respectively is formed the fuel door opening 16 and extending forwardly from the flue sheets are the flues or tubes 17 through which the products of combustion from the firebox are drawn to the smoke box at the front end of the boiler (not shown) in the manner well known. The roof sheet and crown sheet are connected by the usual stay bolts 18 as are the side sheets 4 and 8, throat sheets 3 and 9 and back sheets 1 and 7 respectively. The construction described is typical of that type of locomotive boiler now in general use and need not be described in greater detail.

In the firebox I provide a transversely curved or arched water wall 19 of a flat tu bular cross section which wall while located in the forward end portion of the firebox is spaced a short distance from the flue sheet. Said water wall which is inclined downwardly and forwardy, is suitably staybolted as at 20 and is open at each side where it is flanged as at 21 to fit in suitable openings in the side sheets 4-4;, said flanges being butt welded to said side sheets as at 22. In this instance several of the staybolts connecting the sheets 4: and 8 are employed to connect said flanges to the outer sheets 8-8 as best shown in Fig. 2. It is to be noted that said water wall by reason of its location in the firebox, admirably adapts itself to the functions of the usual brick arch which are therefore unnecessary in connection withmy invention.

The water wall 19 is also in communication with the boiler water space above the crown sheet and to this end I provide one or more upright, flat tubular walls or risers 2323. As herein shown in Fig. 2, two of such walls are employed, each spaced an equal distance apart upon opposite sides of the longitudinal median plane of the boiler. Each upright wall which is also suitably staybolted as at 24 is somewhat reduced in cross sectional area at its top end 25 where it has a lateral flange 26; the same being engaged in associated openings in the crown sheet 5 to be butt welded therein as at 27. Several of the staybolts 18 employed between the roof and crown sheets are employed to connect said flanges 26 to the roof sheet and thus the usual staybolt lay out is in no manner disturbed. r

In each outer side sheet 88 I provide clean out plugs 2828 in a position best adapted for flushing the water wall 19.

In Fig. 3 I have illustrated a slightly modified form of the invention, wherein the forward end of the water wall 19 is connected by one or more short conduits EEO-30 with the water space of the boiler at about the top of the front water leg 11. Such conduits are preferably arranged in the planes of the risers 2323 and produce a more active movement of the water in this part of the boiler.

In operation, under the action of the in,

tense heat in the firebox, water will enter each side of the water wall 19 from the side water legs where the major portion thereof is generated into steam and will pass with the ex tremely hot water up through the risers 2323 to pass into the boiler water space above the crown sheet. By constricting the top end of each riser, a higher water discharge or fountain action is provided to keep the forward portion of the crown sheet awash with water even under low water levels.

The water wall 19 being transversely arched is more rigid in construction to brace the side sheets and the risers rigidly connect the said water wall with the crown sheet which is thereby better adapted to withstand pressure in the boiler water and steam space above the same. Again the said water wall permits of a better flow of water from the side water legs and into the risers and also permits a better self cleaning action.

My improved construction may be readily installed in the fireboxes of locomotives in service as well as in new locomotives the lav up time for the old locomotives during such installation being reduced to a minimum.

While in describing my invention. I have referred in detail to the form as well as construction and arrangement of the parts thereof. the same is to be considered. as bv way of illustration only so that I do not wish to be limited thereto except as may be pointed out in the appended claims. 7

I claim as my invention:

1. A locomotive boiler embodying therein, a crown sheet, side sheets and a flue sheet. a transversely arched, flat tubular water wall inclined downwardly and forwardly toward said flue sheet and opening at its sides through said side sheets, and an upright flat tubular riser arranged longitudinally of said wall and opening at its ends through the top thereof and through the crown sheet respectively, the fore and aft ends of the riser both being substantially disposed in the planes of the like ends of the transversely arched water wall at its mid portion. 2. A locomotive boiler embodying therein, a crown sheet, side sheets and a flue sheet, a transversely arched, flat tubular water Wall inclined downwardly and forwardly toward said flue sheet and opening at its sides through said side sheets, and an upright fiat tubular riser arranged longitudinally of said wall and opening at its ends through the top thereof and through the crown sheet respectively, the fore and aft ends of the riser both being substantially disposed in the planes of the like ends of the transversely arched water wall at its mid portion, said end of said riser opening through said crown sheet being constricted in cross sectional area.

3. A locomotive boiler embodying therein, a crown sheet, side sheets and a flue sheet, a transversely arched, flat tubular water wall inclined downwardly and forwardly toward the flue sheet and opening at its sides through said side sheets, a plurality of upright flat tubular risers arranged longitudinally of said wall and opening at its ends through the top thereof and through the crown sheet respectively, those ends of said risers opening through the crown sheet being constricted in area andconduits connected to the forward end of water wall and opening through the flue sheet in the plane of said risers.

In testimony whereof, I have hereunto set my hand, this 25th day of July, 1927.

CLARENCE E. BODINE. 

